Bank App 만들기 ( deployment ) - 출금 기능 만들기

withdrawal.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>

<!-- header.jsp  -->
<%@ include file="/WEB-INF/view/layout/header.jsp"%>

<!-- start of content.jsp(xxx.jsp)   -->
<div class="col-sm-8">
	<h2>출금 요청(인증)</h2>
	<h5>Bank App에 오신걸 환영합니다</h5>
	<!-- 예외적으로 로그인은 보안 때문에 post로 던지자 -->
	<!-- 
		insert into account_tb(number, password, balance, user_id, created_at)
	 -->
	<form action="/account/withdrawal" method="post"> 
		<div class="form-group">
			<label for="amount">출금 금액:</label>
			<input type="number" class="form-control" placeholder="Enter amount" id="amount" name="amount" value="1000" >
		</div>
		<div class="form-group">
			<label for="wAccountNumber">출금 계좌 번호:</label>
			<input type="text" class="form-control" placeholder="Enter account number" id="wAccountNumber" name="wAccountNumber" value="1111">
		</div>
		<div class="form-group">
			<label for="pwd">출금 계좌 비밀 번호 :</label>
			<input type="password" class="form-control" placeholder="Enter password" id="pwd" name="password" value="1234"  >
		</div>		
		
		<div class="text-right">
			<button type="submit" class="btn btn-primary">출금 요청</button>
		</div>
		
	</form>
</div>
<!-- end of col-sm-8  -->
</div>
</div>
<!-- end of content.jsp(xxx.jsp)   -->

<!-- footer.jsp  -->
<%@ include file="/WEB-INF/view/layout/footer.jsp"%>

 

 

 

AccountController 하에 추가

	
	/**
	 * 출금 페이지 요청 
	 * @return withdrawal.jsp
	 */
	@GetMapping("/withdrawal")
	public String withdrawalPage() {
		// 1. 인증검사 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		
		return "account/withdrawal";
	}

 

 

 

 

결과화면

 

 

 

 

withdrawalDTO

package com.tenco.bank.dto;

import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@ToString
public class WithdrawalDTO {
	
	private Long amount;
	private String wAccountNumber; 
	private String wAccountPassword; 
}

 

 

 

 

AccountController

package com.tenco.bank.controller;

import java.util.List;

import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;

import com.tenco.bank.dto.SaveDTO;
import com.tenco.bank.dto.WithdrawalDTO;
import com.tenco.bank.handler.exception.DataDeliveryException;
import com.tenco.bank.handler.exception.UnAuthorizedException;
import com.tenco.bank.repository.model.Account;
import com.tenco.bank.repository.model.User;
import com.tenco.bank.service.AccountService;
import com.tenco.bank.utils.Define;

import jakarta.servlet.http.HttpSession;

@Controller  // IoC 대상(싱글톤으로 관리) 
@RequestMapping("/account")
public class AccountController {
	
	// 계좌 생성 화면 요청 - DI 처리  
	private final HttpSession session;
	private final AccountService accountService;
	
	// @Autowired
	public AccountController(HttpSession session, AccountService accountService) {
		this.session = session;
		this.accountService = accountService;
	}
	
	/**
	 * 계좌 생성 페이지 요청 
	 * 주소 설계 : http://localhost:8080/account/save
	 * @return save.jsp 
	 */
	@GetMapping("/save")
	public String savePage() {
		
		// 1. 인증 검사가 필요(account 전체가 필요함) 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		return "account/save";
	}
	
	/**
	 * 계좌 생성 기능 요청 
	 * 주소 설계 : http://localhost:8080/account/save
	 * @return : 추후 계좌 목록 페이지 이동 처리 
	 */
	@PostMapping("/save")
	public String saveProc(SaveDTO dto) {
		// 1. form 데이터 추출 (파싱 전략)  
		// 2. 인증 검사
		// 3. 유효성 검사
		// 4. 서비스 호출 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		
		if(dto.getNumber() == null || dto.getNumber().isEmpty()) {
			throw new DataDeliveryException(Define.ENTER_YOUR_ACCOUNT_NUMBER, HttpStatus.BAD_REQUEST);
		}
		
		if(dto.getPassword() == null || dto.getPassword().isEmpty()) {
			throw new DataDeliveryException(Define.ENTER_YOUR_PASSWORD, HttpStatus.BAD_REQUEST);
		}
		
		if(dto.getBalance() == null || dto.getBalance() <= 0) {
			throw new DataDeliveryException(Define.ENTER_YOUR_BALANCE, HttpStatus.BAD_REQUEST);
		}
		accountService.createAccount(dto, principal.getId());
		return "redirect:/index"; 
	}
	
	
	/**
	 * 계좌 목록 화면 요청 
	 * 주소설계 : http://localhost:8080/account/list, ..../ 
	 * @return list.jsp 
	 */
	@GetMapping({"/list", "/"})
	public String listPage(Model model) {
		
		// 1. 인증검사 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		// 2. 유효성 검사 
		// 3. 서비스 호출 
		List<Account> accountList = accountService.readAccountListByUserId(principal.getId());
		if(accountList.isEmpty()) {
			model.addAttribute("accountList", null);
		} else {
			model.addAttribute("accountList", accountList);
		}
		
		// JSP 데이트를 넣어 주는 방법 
		return "account/list";
	}
	
	/**
	 * 출금 페이지 요청 
	 * @return withdrawal.jsp
	 */
	@GetMapping("/withdrawal")
	public String withdrawalPage() {
		// 1. 인증검사 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		return "account/withdrawal";
	}
	
	
	@PostMapping("/withdrawal")
	public String withdrawalProc(WithdrawalDTO dto) {
		// 1. 인증검사 
		User principal = (User)session.getAttribute(Define.PRINCIPAL);
		if(principal == null) {
			throw new UnAuthorizedException(Define.NOT_AN_AUTHENTICATED_USER, HttpStatus.UNAUTHORIZED);
		}
		
		// 유효성 검사 (자바 코드를 개발) --> 스프링 부트 @Valid 라이브러리가 존재 
		if(dto.getAmount() == null) {
			throw new DataDeliveryException(Define.ENTER_YOUR_BALANCE, HttpStatus.BAD_REQUEST);
		}
		
		if(dto.getAmount().longValue() <= 0) {
			throw new DataDeliveryException(Define.W_BALANCE_VALUE, HttpStatus.BAD_REQUEST);
		}
		
		if(dto.getWAccountNumber() == null) {
			throw new DataDeliveryException(Define.ENTER_YOUR_ACCOUNT_NUMBER, HttpStatus.BAD_REQUEST);
		}
		
		if(dto.getWAccountPassword() == null || dto.getWAccountPassword().isEmpty()) {
			throw new DataDeliveryException(Define.ENTER_YOUR_PASSWORD, HttpStatus.BAD_REQUEST);
		}
		
		accountService.updateAccountWithdraw(dto, principal.getId());
		return "redirect:/account/list";
	}
}

 

 

 

 

 

AccountService

package com.tenco.bank.service;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataAccessException;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.tenco.bank.dto.SaveDTO;
import com.tenco.bank.dto.WithdrawalDTO;
import com.tenco.bank.handler.exception.DataDeliveryException;
import com.tenco.bank.handler.exception.RedirectException;
import com.tenco.bank.repository.interfaces.AccountRepository;
import com.tenco.bank.repository.interfaces.HistoryRepository;
import com.tenco.bank.repository.model.Account;
import com.tenco.bank.repository.model.History;
import com.tenco.bank.utils.Define;

@Service 
public class AccountService {

	private final AccountRepository accountRepository;
	private final HistoryRepository historyRepository;
	
	@Autowired // 생략 가능  - DI 처리 
	public AccountService(AccountRepository accountRepository, HistoryRepository historyRepository) {
		this.accountRepository = accountRepository;
		this.historyRepository = historyRepository;
	}
	
	/**
	 * 계좌 생성 기능 
	 * @param dto
	 * @param id
	 */
	// 트랜 잭션 처리 
	@Transactional
	public void createAccount(SaveDTO dto, Integer principalId) {
		int result = 0; 
		
		try {
			result = accountRepository.insert(dto.toAccount(principalId));
		} catch (DataAccessException e) {
			throw new DataDeliveryException("잘못된 요청입니다", HttpStatus.INTERNAL_SERVER_ERROR);
		} catch (Exception e) {
			throw new RedirectException("알 수 없는 오류 입니다", HttpStatus.SERVICE_UNAVAILABLE);
		}
		
		if(result == 0) {
			throw new DataDeliveryException("정상 처리 되지 않았습니다", HttpStatus.INTERNAL_SERVER_ERROR);
		}
	}

	public List<Account> readAccountListByUserId(Integer userId) {
		List<Account> accountListEntity = null; 
		try {
			accountListEntity = accountRepository.findByUserId(userId);
			
		} catch (DataAccessException e) {
			throw new DataDeliveryException("잘못된 처리 입니다.", HttpStatus.INTERNAL_SERVER_ERROR);
		} catch (Exception e) {
			throw new RedirectException("알 수 없는 오류", HttpStatus.SERVICE_UNAVAILABLE);
		}
		return accountListEntity; 
	}
	
	// 한번에 모든 기능을 생각 힘듬 
	// 1. 계좌 존재 여부를 확인 -- select 
	// 2. 본인 계좌 여부를 확인 -- 객체 상태값에서 비교 
	// 3. 계좌 비번 확인 --        객체 상태값에서 일치 여부 확인
	// 4. 잔액 여부 확인 --        객체 상태값에서 확인 
	// 5. 출금 처리      --        update 
	// 6. 거래 내역 등록 --        insert(history) 
	// 7. 트랜잭션 처리 
	@Transactional
	public void updateAccountWithdraw(WithdrawalDTO dto, Integer principalId) {
		// 1. 
		Account accoutEntity = accountRepository.findByNumber(dto.getWAccountNumber());
		if(accoutEntity == null) {
			throw new DataDeliveryException(Define.NOT_EXIST_ACCOUNT, HttpStatus.BAD_REQUEST);
		}
		
		// 2
		accoutEntity.checkOwner(principalId);
		// 3
		accoutEntity.checkPassword(dto.getWAccountPassword());
		// 4 
		accoutEntity.checkBalance(dto.getAmount());
		// 5 
		// accoutEntity 객체의 잔액을 변경하고 업데이트 처리해야 한다. 
		accoutEntity.withdraw(dto.getAmount());
		// update 처리 
		accountRepository.updateById(accoutEntity);
		// 6 - 거래 내역 등록 
		History history = new History();
		history.setAmount(dto.getAmount());
		history.setWBalance(accoutEntity.getBalance());
		history.setDBalance(null);
		history.setWAccountId(accoutEntity.getId());
		history.setDAccountId(null);
				
		int rowResultCount = historyRepository.insert(history);
		if(rowResultCount != 1) {
			throw new DataDeliveryException(Define.FAILED_PROCESSING, HttpStatus.INTERNAL_SERVER_ERROR);
		}
	}
}

: History 등록 시 입금,출금,이체 3가지 형태가 존재한다. 따로 이력의 형태를 따로 컬럼을 추가해서 생성하지 않고 ROW 들어간 값에 형태로 구분해 낼 수 있다. DB 에서 데이터의 형태를 보고 의미를 추론 할 수 있도록 연습하는 과정도 반드시 필요하다.

 

 

 

 

Account

package com.tenco.bank.repository.model;

import java.sql.Timestamp;
import org.springframework.http.HttpStatus;
import com.tenco.bank.handler.exception.DataDeliveryException;
import com.tenco.bank.utils.Define;
import lombok.AllArgsConstructor;
import lombok.Builder;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.ToString;

@Data
@NoArgsConstructor
@AllArgsConstructor
@Builder
@ToString
public class Account {
	
	private Integer id;
	private String number;
	private String password; 
	private Long balance; 
	private Integer userId; 
	private Timestamp createdAt;
	
	// 출금 기능
	public void withdraw(Long amount) {
		// 방어적 코드 
		this.balance -= amount;
	}
	// 입금 기능 
	public void deposit(Long amount) {
		this.balance += amount;
	}
	
	// 패스워드 체크 
	public void checkPassword(String password) {
		//     f                          ==  f 일때 ---> true 
		if(this.password.equals(password) == false) {
			throw new DataDeliveryException(Define.FAIL_ACCOUNT_PASSWROD, HttpStatus.BAD_REQUEST);
		}
	}
	// 잔액 여부 확인 - checkBalance
	public void checkBalance(Long amount) {
		if(this.balance < amount) {
			throw new DataDeliveryException(Define.LACK_Of_BALANCE, HttpStatus.BAD_REQUEST);
		}
	}
	
	// 계좌 소유자 확인 기능 - checkOwner 
	public void checkOwner(Integer principalId) {
		if(this.userId != principalId) {
			throw new DataDeliveryException(Define.NOT_ACCOUNT_OWNER, HttpStatus.BAD_REQUEST);
		}
	}
}

 

 

 

 

 

 

AccountRepository

package com.tenco.bank.repository.interfaces;

import java.util.List;

import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;

import com.tenco.bank.repository.model.Account;

//AccountRepository 인터페이스와 account.xml 파일을 매칭 시킨다. 
@Mapper 
public interface AccountRepository {
	public int insert(Account account);
	public int updateById(Account account);
	public int deleteById(Integer id, String name);
	// interface 파마리터명과 xml 에 사용할 변수명을 다르게 사용해야 된다면 @param 애노테이션을 
	// 사용할 수 있다. 그리고 2개 이상에 파라미터를 사용할 경우 반드시 사용하자! 
	public List<Account> findByUserId(@Param("userId") Integer principalId);
	// --> account id 값으로 계좌 정보 조회 
	public Account findByNumber(@Param("number") String id);
	// 코드 추가 예정
}

 

 

 

 

 

account.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.tenco.bank.repository.interfaces.AccountRepository">
	
	<!-- 반드시 세미콜론을 제거 해야 한다.   -->
	<!-- id는 매칭되어 있는 인터페이스에 메서드 명과 같아야 한다.  -->	
	
	<insert id="insert">
		insert into account_tb(number, password, balance, user_id, created_at)
		values(#{number}, #{password}, #{balance}, #{userId}, now())
	</insert>	
	
	<update id="updateById">
		update account_tb set number = #{number}, password = #{password},
			balance = #{balance}, user_id = #{userId} where id = #{id}
	</update>
	
	<delete id="deleteById">
		delete from account_tb where id = #{id}
	</delete>

	<select id="findByUserId" resultType="com.tenco.bank.repository.model.Account">
		select * from account_tb where user_id = #{userId} 
	</select>
	
	<select id="findByNumber"  resultType="com.tenco.bank.repository.model.Account">
		select * from account_tb where number = #{number}
	</select>
	
</mapper>

 

 

 

 

 

history.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.tenco.bank.repository.interfaces.HistoryRepository">
	
	<insert id="insert">
		insert into history_tb(amount, w_balance, d_balance, w_account_id, d_account_id)
		                values(#{amount}, #{wBalance}, #{dBalance}, #{wAccountId}, #{dAccountId} )	
	</insert>
	
	<update id="updateById">
		update history_tb
		set amount = #{amount},
			w_balance = #{wBalance},
			d_balance = #{dBalance},
			w_account_id = #{wAccountId},
			d_account_id = #{dAccountId}
			where id = #{id}			
	</update>
	
	<delete id="deleteById">
		delete from history_tb where id = #{id}
	</delete>
	
	<select id="findById" resultType="com.tenco.bank.repository.model.History">
		select * from history_tb where id = #{id}
	</select>
	
	<select id="findAll" resultType="com.tenco.bank.repository.model.History">
		select * from history_tb
	</select>
	
</mapper>